| US 7,340,008 B2 | ||
| Method and apparatus for rearranging codeword sequence in a communication system | ||
| Min-Goo Kim, Suwon-shi (Korea, Republic of); Sang-Hyuck Ha, Suwon-shi (Korea, Republic of); and Seong-Woo Ahn, Yongin-shi (Korea, Republic of) | ||
| Assigned to Samsung Electronics Co., Ltd, (Korea, Republic of) | ||
| Filed on Dec. 22, 2003, as Appl. No. 10/744,221. | ||
| Application 10/744221 is a continuation of application No. 10/166480, filed on Jun. 10, 2002, granted, now 7,130,358. | ||
| Claims priority of application No. 10-2001-32355 (KR), filed on Jun. 09, 2001. | ||
| Prior Publication US 2005/0047522 A1, Mar. 03, 2005 | ||
| Int. Cl. H04L 27/36 (2006.01) | ||
| U.S. Cl. 375—298 [375/295; 375/308] | 12 Claims |
| 1. A method for mapping a stream of bits output from an encoder to a stream of bits for 8PSK (8-ary Phase Shift Keying) modulation,
comprising the steps of:
dividing the stream of bits from the encoder into a first period and a second period, wherein the first period includes bits
with higher priority and the second period includes bits with lower priority; and
mapping the stream of bits from the encoder to 3 bit positions representing each of the bits for 8PSK modulation, determined
by
s0(i)=x(2·N+i)
s1(i)=x(2·i)
s2(i)=x(2·i+1)
where x(i) indicates an i-th bit before mapping, s(i) indicates an i-th bit after mapping, s0(i), indicates a first bit among the i-th 3 bits representing each of the bits for 8-ary PSK modulation, s1(i) indicates a second bit among the i-th 3 bits representing each of the bits for 8-ary PSK modulation, s2(i) indicates a third bit among the i-th 3 bits representing each of the bits for 8-ary PSK modulation, and i indicates positions
of the bits from 0 to (N−1).
|